Eugene prenveille and philippe stein



(No Model.)

B. PR'ENVEILLE & P. STEIN.

PISTON ROD.

PatentedAu.

I I I UNITED STATES PATENT OFFICE.

EUGENE PRENVEILLE AND PHILIPPE STEIN, OF PARIS, FRANCE.

PISTON-ROD.

SPECIFICATION forming part of Letters Patent No. 434,524, dated August19, 1890.

Application filed June 5, 1890- Serial No. 354,360. (No model.)

To aZZ whom, it may concern.-

Be it known that we, EUGENE PRENVEILLE and PHILIPPE STEIN, citizens ofthe French Republic, residing at Paris, France, have invented certainnew and useful Improvements in Piston-Rods, of which the following is afull, clear, and exact description.

Our invention has relation to piston-rods; and it has for its objects togreatly increase the motive power of an engine to which said rod isapplied for a given amount of fuel, and thereby effect a great saving inthe latter, and by thus economizing the amount of fuel used to effect asaving in space, which in steamships' and merchant vessels can beutilized for the storage of merchandise or for other purposes.

The invention consists in the peculiar construction of the piston-rod,as hereinafter fully described, illustrated in the accompanyingdrawings, and pointed out in the appended claim.

In the drawings, Figure 1 represents in side elevation the pivotedsection or member of the piston-rod; Fig. 2, a plan view thereof; Fig.3, a side elevation of a cylinder, the piston-rod, connecting-rod, andcrank of an engme.

- Ourimproved piston-rod is composed of the two sectionsor members EE.The latter member we have shown as having a substantially U shape, thelegO of which is pivoted at its upper end to the outer end of thestraight memberE of the rod, while the leg A of the member E is pivotedat its upper end to the connecting-rod F, all as shown. Inasmuch as themember E has a U shape, we prefer to strengthen the same at the pointsof greatest straino'. e., near the upper ends of the legs A Candtherefore we form integral with said legs the brace-rod D, though thelatter could be formed separately and attached in any suitable manner tothe legs. The member E is pivoted at a point B, which is at the junctionof the horizontal portion B and leg 0 of said member, and said pivotalpoint may be slightly to the left of a line drawn vertically through thecenter of the pivot at the junction of the legC and member E, and by solocating the pivotal point B the latter becomes a multiplier, and themotive power of the engine will be found to be greatly increased. Theouter end of the connectingrod F is pivoted, as usual, to the crank b,as shown. The pivot upon which the member E is pivoted at the point Bmay be supported or carried by any stationary part of the engine.

Our improved piston-rod may be substituted for any of the ordinarypiston-rods in either vertical or horizontal engines. The point B neednot be located more than one inch to theleft of the line beforementioned to accomplish the desired results. The shape of the member Ecan of course be varied from that shown without departing from theinvention.

Having now described our invention and in what manner the same is to becarried into effect, we claim as new and desire to secure by LettersPatent- The combination,with the piston-rod com posed of the members Eand E, pivoted together, as described, said member E being pivoted atthe point B,of the connecting-rod F, pivoted to the memberE,and thecrank b, to which said connecting-rod is pivoted, all arranged forco-operation, substantially as and for the purpose specified.

In testimony that we claim the foregoing we have hereunto set our handsthis 22d day of May, 1890.

EUGENE PRENVEILLE. PHILIPPE STEIN.

\Vit-n esses:

G. MATRAY, R. J. PRESTON.

